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Table 3 Multivariate logistic regression model of nosocomial influenza risk factors, Catalonia (Spain)

From: Hospital-acquired influenza infections detected by a surveillance system over six seasons, from 2010/2011 to 2015/2016

Variables

Adjusted OR (95% CI)

P value

Chronic renal disease

 Yes

2.44 (1.44–4.15)

< 0.001

 No

Ref.

 

Immunodeficiency

 Yes

1.79 (1.04–3.06)

0.03

 No

Ref.

 

Liver disease

 Yes

1.72 (0.75–3.96)

0.19

 No

Ref.

 

Antiviral treatment

 ≤ 48 h before symptom onset

3.43 (1.45–8.12)

0.01

 > 48 h before symptom onset

0.51 (0.21–1.26)

0.15

 No

Ref.

 

Hospital stay

 0–14 days

Ref.

 

 > 14 days

2.57 (1.59–4.16)

< 0.001

Pneumonia

 Yes

0.42 (0.26–0.68)

< 0.001

 No

Ref.

 

ARDS

 Yes

0.60 (0.34–1.05)

0.07

 No

Ref.

 

Death

 Yes

2.25 (1.18–4.26)

0.01

 No

Ref.

 
  1. ARDS Acute respiratory distress syndrome, ICU Intensive care unit, OR Odds ratio, CI Confidence interval